The Canon EF 300mm is a telephoto lens designed for use with Canon DSLR cameras. It features a focal length of 300mm, making it ideal for capturing distant subjects, such as wildlife or sports events. The lens has a fast maximum aperture of f/2.8, allowing for excellent low-light performance and beautiful background blur. This lens is known for its sharp image quality and durable construction, making it suitable for professional photographers. It also includes image stabilization technology, which helps reduce camera shake, ensuring clearer images even at longer distances. The Canon EF 300mm is a popular choice among wildlife and sports photographers.